Nite Ize Inka Mobile Pen + Stylus Durable, lightweight Carbon Fiber and nylon Components Features carabiner clip for secure attachment and easy release Easy-access quick use pen Easy-access touch-screen capacitive stylus for convenient use with iPads, iPhones, Android devices, and other touch screen devices Features a replaceable pressurized blue ink cartridge that gives the Inka Mobile it's amazing ability to write in extreme conditions